She's been delighting male fans on her Femme Fatale tour by choosing one lucky guy to join her on stage to receive a sexy lap dance from the singer herself.

But, as the tour hit New York last night, Britney decided to invite her biggest fan on the stage, her boyfriend Jason Trawick, as she performed her hit single Lace and Leather at the concert in New York's Nassau Coliseum.

Wrapped in a pink feather boa, Jason, who was handcuffed with his hands behind his back while sitting on a chair, struggled to keep the wide smile off his face as his girlfriend gyrated her way around the pole wearing little more than a nude leotard and black biker boots.

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Having fun, Jason? Britney Spears pulled boyfriend Jason Trawick on stage for a sexy lap dance as her Femme Fatale tour arrived in New York last night

Raunchy: Jason appeared to be having the time of his life as Britney danced and gyrated her way around him

Britney then jumped up on the pole and wrapped her legs around Jason's neck, causing him to pretend to bite her leg.

A clearly delighted Britney also failed to hide her excitement as she teased Jason with her raunchy moves.

After the lap dance, Britney grinned and waved at fans before letting Jason out of his restraints.

Sexy: Britney wore a nude and black leotard and matching gloves as she performed her hit Lace and Leather

Angelic: Britney certainly appears to be enjoying her Femme Fatale tour, which requires a series of costume changes and rigorous dance routines from the mother-of-two

Britney and Jason's relationship appears to have gone from strength to strength in recent months.

And, in an interview earlier this year, the 29-year-old singer dropped a strong hint that she was planning to tie the
knot with Jason, saying 'never say never,' when asked if they were
planning to walk down the aisle any time soon.

Britney also told U.S. Harper’s Bazaar magazine that she
has already considered marriage and kids with Jason.

Toned: For another routine during the performance at New York's Nassau Coliseum, Britney donned a bra and shorts

Japanese style: Another costume change involved Britney strutting her stuff in a colourful kimono gown

'I've thought about both. So if the
timing was right...' she said, before going on to reveal how
happy she is after overcoming extreme personal problems in recent years.

‘I feel like I'm drinking a tall glass of homemade sweet tea on a really hot, beautiful day,’ she said.

Jason, who was Britney's manager until earlier this year, has been accompanying the mother-of-two on most of her tour dates.

Support act: Nicki Minaj has been supporting Britney throughout her Femme Fatale tour

Special guest: Kanye West delighted fans last night when he arrived to sing with Minaj

And Britney told MTV News recently that she is enjoying every second of being back on the road again.

She said: 'It’s like every other day we have another show, so we are really busy. It’s a lot of fun. I like being busy.

'The shows have been equally amazing.
The crowds have been so good each night and that gives you the
adrenaline you need to get through the show. It just pumps you up. Every
night is a blast.'

After last night's New York concert, Britney told her followers on Twitter: 'I gotta say it. There's no crowd like a NY crowd. You guys are incredible. I had the best time.'